TWM346237U - Digital decoder box with multiple audio source detection function - Google Patents

Abstract

A digital decoder box is introduced herein for processing multiple-channel digital audio sources. The decoder box can judge formats of the received audio sources and perform different decoding treatments, and then transmit to an earphone with 5.1 channels for playing. When an audio source with 5.1-channel format is received, three sets of audio signals for different channels such as signals for front speakers, rear speakers, and center speaker/sub woofers speakers are generated for the 5.1-channel earphone. When a stereo source with 2 channel format is received, the amplified audio signals from the decoder box are transmitted to at least two sets of the speakers within the 5.1-channel earphone for playing. By the space arrangement of the speakers within the earphone, the sound field generated therefrom can have different sound effects.

Description

M346237 VIII. New description: [New technical field] 曰本疋 疋 has a digital multi-channel headphone decoding device, and particularly relates to a multi-channel digital stereo sound field earphone device. [Prior Art] With the advancement of digital technology, people's life and entertainment have gradually become digital. 1 For example, DigitalV_tileDisc (DVD) is a common video playback device for home towels. And since the DVD player basically has Dolby Digital (Dolby

Digital) or the decoding function of the digital theater system (which is commonly referred to as DTS), so it can be used to decode the ship's line and output the analogy to the multi-channel amplifier to make the 51-channel π-eight system.

sound. ...X To have a two-quality digital audio and video entertainment life, multi-channel amplifiers and speakers are indispensable, and 5.1-channel speakers are the most basic multi-channel system. The home theater, which usually has a 5.1-channel extension and speaker, plays the video and audio at the same time as the DVD player, and expands the opportunity to separately output different audio signals to the left and right speakers of the front main channel, and the center channel. (Center) mouth eight, surround left channel (gurr〇und 〇r Rear) left left eight and right squad, and the heavy bass left team smart oil W〇〇fer), so that it produces three-dimensional sound effects, so People have a sense of realism. However, when it is not suitable to use a horn to play sounds (for example, it will hinder others from doing things), you must use headphones to listen. The general 5 M346237 is equipped with a gamma Y, so that the viewer can't enjoy the multi-channel sound output from the DVD player = there are multiple • deleted, respectively, the left and right 'two mouths eight' can be used to connect to Multi-channel cutting. However, at present, the amplifiers that provide ^== multi-channel headphones do not have different formats of digits; the source is detected and different decoding processing is performed.

[New content] This creation proposes a digital decoding box suitable for connecting to a multi-channel earphone. The digital decoding box includes a digital signal processor, a multi-channel digital analog conversion, a multi-channel headphone amplifier, The input format extracting device, a delay device, and a subwoofer/front speaker selection switching device. The digital signal processing is used to receive the digital audio signal and to decode and output the decoded signal. The multi-channel digital class (4) is connected to the digital signal processor for receiving the decoded signal and converting it into an analog signal. The multi-channel headphone amplifier is connected to the multi-channel digital analog converter for receiving the analog signal, and according to the amplification, outputs a pre-channel signal (including left and right) and a bad surround signal (including left , right), a center channel signal and a subwoofer signal. The wheeled format detecting device is connected to the multi-channel digital analog converter for detecting the actual output channel number of the decoded signal, and outputting a control signal to perform the headphone working mode switching. The subwoofer/front puller 8 selection switching device is connected to the input format detecting device and the delay device for receiving the pre-channel signal outputted by the delay device and the subwoofer signal from the 6-channel headphone amplification state, and according to Control signal and switch the front channel and 6 M346237. 'When only the front channel has output and the surround sound has no output, the subwoofer/front speaker selects the switching device to lower the ear bass output and The left and right front channels are combined with the wheel and the left and right subwoofers are cut off to cut the weight to the stereoscopic sound. Extend the job to receive all the messages, and delay processing to output shock to the eardrum. m boot (10) The above digital decoding box, including an automatic input selector,

The source is received from two different sources, and the source signal is selected and transmitted to the digital signal processor. ',,, 曰 Different sources are transmitted by fiber optic lines or coaxial lines, and the self-selector is more prioritized for sources from the domain cryptosity than those from the (10) line. In the above digital decoding box, the digital signal processor can decode the encoded signal in the Dolby Digital 5.1. Dolby Digital 2.0 ^ Dolby Pro Logic ^ LPCM (stereo) or DTS format. The above-mentioned digital decoding box further includes a display device for displaying the tilting message of the digital decoding box. These jade mode messages include the decoding format of the digital decoding box and the volume setting of different channels. The above-mentioned digital decoding box further includes a control panel for allowing the user to input the set value to adjust the control state of the digital decoding box. The above digital decoding box further includes a microcontroller for controlling the operation mode of the digital signal processor and the multi-channel digital analog converter. These modes of operation include, for example, volume control and digital signal processor health monitoring. The multi-channel earphone described above includes a headphone body including a chamber body and a 7 M346237 main to support wood, a main left and a younger stab team and at least one pair of chamber extension tubes. The main chamber support has a plurality of holes, wherein a front chamber mixing chamber, a main chamber and a rear chamber are formed in the chamber body. The main racquet and the first sub horn, wherein the main horn is located on the main sound chamber support frame, and the first sub horn is placed on the protrusion of the cavity to the main body, and the rear sound chamber is formed with the main sound chamber support frame. The pair of chamber extension tubes are disposed outside the chamber body and respectively have an opening toward the interior of the chamber body to form a portion of the main sound chamber, and the earphone is adjusted by the space between the chamber and the inner space of the main body and the chamber extension tube. A composite sound field characteristic formed between the front cavity mixing chamber, the main sound chamber and the rear sound chamber formed in the knot, and serves as an output of the multi-channel earphone. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description. [Embodiment] The present invention provides a digital decoding box suitable for receiving a multi-channel sound source. The digital decoding box can interpret the received sound source signal format to perform different decoding processes and transmit to a 5.1 channel. Headphone playback. ^ For example, when receiving a sound source from a DVD player or provided by a game console with a 5.1 channel, the digital decoding box decodes the source of the channel and transmits it to the 51-channel earphone. Play, and the output number includes a set of signal sources such as front-end (Front) signal, rear stereo (in rainbow) ° 艮, center channel (Center) signal and Sub woofer (Sub woofer) signal. 8 M346237 However, if the received sound source is a two-channel stereo sound source, such as a two-channel audio source signal from a DVD player, such as a linear pulse code modulation (LPCM) format source, The digital decoding box provided by the creation can transmit the amplified signal to at least two groups of speakers in the 5.1 headphone at the same time, and use the 51 f different speaker groups in the earphone. Producing a sonar with a sound field separation effect, so that a stereo sound source that is originally a two-channel sound source produces different sound field effects. Referring to FIG. 1, a digit having a judgment sound source format proposed in the preferred embodiment of the present invention is shown. The decoding box and the application diagram thereof. The digital decoding box 130 of the embodiment can be connected to a digital versatile optical disc (Digital Versat Ue Disc, hereinafter referred to as "DVD,") player 11 via a line 112, and the line, 112 can be any form. Signal lines, such as fiber optic (〇 ptkal Flber) or coaxial cable (c〇axiaUine) can be used. In addition, the digital decoding box 130 of this embodiment can also be connected to the game console 12 through a variety of different lines. The digital & megaphone 13G is connected to the earphone 14 具有 having a 5.1 channel, for example, a connection terminal 144 of the connection terminal. I. Fig. 2 is a schematic diagram showing the top view, front view, back view and left view of the digital decoding box with the interpretation sound privately proposed in the present embodiment. This digital decoding box 2GG has a format in which the sound source signal can be interpreted, and is not displayed on the display screen 21G. For example, "DTS" is displayed on the display screen 210, and is a multi-drawing audio signal source of the DTS, and if it is a Dolby digit (alcoal = al) format, "D〇lby" is displayed. In addition, in the case of a two-channel stereo guise sound source, for example, "Stere 〇,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The type of display described above, depending on the format of the audio source received by the digital decoding box 200, is currently more common in the above types, but is not limited. The above-mentioned DTS' is a digital theater system for a few coffee makers. It is called one of the multi-channel audio formats and is widely used in Dv sound effects. The most embarrassing format is 5.1 channels. The above-mentioned Dolby Digital (4)^ lion) format is a technology developed by the American company Dolby Laboratories. The bee or the like is the most independent of the six channels: the version, the most well-known 5.1 channel technology. The digital decoding box 200 further includes an in-timbrity adjustment button 220 for controlling the output volume intensity, and an intensifying or attenuating button for controlling the pre- and surround (^Fn>nt+, Rear) as shown. , control the center (as shown in the ^Center) to strengthen or weaken the button, or control the boost or weaken button of the subwoofer (Subwoofer as shown). The display screen 21〇 also shows the current The strong and weak indicators, as indicated by the position indicated by Figure 214, are +10, "_3" and "+8". In addition, the digital decoding box 200 is further modified to include the volume level (as indicated in the figure). Button 222 of "v〇lume Reset,," and button 224 of mute ("Mute"). In the control of the above-mentioned tone 1 by the digital decoding box 200, the volume of the volume controlled by the user for the different channels is memorized in a memory manner, and does not disappear with the power off. However, if it is necessary to reset, it is only necessary to select the button 222 to be reset. On the side of the digital decoding box 200, there are two input ports 230 and 232' where the input port 230 is connected to the optical fiber end M346237, and the input port 232 is a coaxial line ( Coaxial line) The location where the terminals are connected. In addition, it also includes a power input port 234 that can be connected to the AC power source through an AC power source (AC in the illustration). On the other side, there is a power switch 236 that can turn the digital decoding box 200 on or off. On the other side of the digital decoding box 200, there are three signal outputs 埠240, 242 and 244. It is used to connect to the multi-channel earphone 250 via a 3.5mm Phone Plug connection. The signal source outputs 埠240, 242, and 244 respectively provide, for example, a front channel (Fr〇nt), a surround channel (Rear), a center and a subwoofer channel (Center/Subwoofer) in the 5.1 channel, as shown in the figure. The "C/Sub" shown. If the digital decoding box 200 receives, for example, a sound source from a DVD player or a 5.1 channel provided by the game host, the digit box decodes and amplifies the sound source of the 5.1 channel and transmits it to 51. The j-channel headphones are played, and the output signals include three sets of analog signals, such as front-end (Front), rear-mounted stereo (Rear), center and subwoofer (c/sub), and multi-channel headphones. Produces sound effects with surround sound or multiple effects. If the digital decoding 200 receives a two-channel stereo source, such as from a Dolby 2.0 channel or a CD with two channels: U> CM source signal, this digital decoding * 2 〇〇 will solve the signal After the horse is amplified, it is transmitted to at least two groups of ♦8 in the 5.1-channel headphones for playback. For example, the same day is transmitted via the signal source output 埠240 and 244 to transmit the front (Fr〇nt) speaker and the subwoofer (C/Sub) speaker. The multi-channel earphones are 25 inches, which is different from the traditional front speaker group that is only transmitted to the multi-channel headphones 250 by the 11 M346237. In this way, by using the empty (four) set in the multi-channel earphone 250, a sound having a sound effect is generated, and a stereo sound source which is originally a two-channel sound source is generated, and a sound field effect is produced. ^ The multi-channel earphone device proposed by this creation has the effect of allowing the extended sound chamber, the multi-channel earphone to have a thick saturated sound field at the minimum volume, and the multi-channel surround sound effect. The body of the earphone includes a main tone φ within the body of the chamber to a support frame or partition. A front chamber mixing chamber, a main chamber and a rear chamber are formed in the chamber body. The main horn is located on the main chamber support frame or partition, and the sub horn is placed behind the chamber body to form a rear chamber with the main chamber support. A composite sound field characteristic formed between the front cavity mixing chamber, the main sound chamber and the rear sound chamber formed in the earphone structure is adjusted by the space in the chamber body, and is used as an output of the multi-channel earphone. 3A to 3D, the front side view, the side view, the front view and the back view of the multi-channel earphone structure 3 of the multi-channel digital sound field earphone device of the present embodiment are respectively shown. • Referring to Figures 3A to 3D, the multi-channel headphone structure 3A includes at least a chamber body 310, a main remaining group 340 and a remaining η eight 350, and chamber extension tubes 320 and 330. This chamber body 310 then includes a front chamber mixing chamber portion 312 and a rear chamber portion 314. There is a main chamber support frame 313 between the interior of the front chamber mixing chamber portion 312 and the rear chamber portion 314. The main chamber support frame 313 has a plurality of holes 315A-315D therein, wherein the holes 315A and 315B are used to transmit the sound field generated by the rear chamber portion 314 to the front chamber mixing chamber portion 312' for the front chamber mixing chamber portion. A mix of sound fields is performed within 312 and transmitted to the listener in the direction of 12 M346237 360. The main horn 340 is located between the plurality of holes 315A 315 315D on the main chamber support 313, and the front chamber mixing chamber portion 312 has a certain depth in the direction 360 to the listener to form a certain space as a space. The front cavity mixing chamber is designed to meet the requirements of the multi-channel earphone structure 3 (8). The rear chamber portion 314 forms a space between the main chamber support frame 313 and the projection 317 on the rear side of the chamber body 310 for forming a rear chamber cavity. The sub-horn 350 is fixed to the projection 317 on the rear side of the chamber main body 31.

Around the chamber to the body 310, there are chamber extension tubes 320 and 330, and their sound field outlets, in this embodiment, are toward the apertures 315C and 315D of the main chamber support frame 313, respectively. The size of the main sound chamber support frame 313 formed in the independent sound chambers formed by the holes 315C and 315D (10) is a factor to be considered in designing the main cavity structure of the earphone proposed by the present invention, and the widths 319C and 319D' are also designed. Features. In the case where the holes 315C and 315D^ are formed, the generated sound field transmits the sub-mixing chamber knife 312' to mix the sound field in the front cavity mixing chamber portion 312 and transmit it in the direction of 360. listener. In this way, the space distribution in the chamber main body 31 can be calculated according to the characteristics of the 八 八, and the size can be adjusted according to the locating room of the main sound chamber, the rear sound chamber and the front chamber mixing chamber. The outermost edges of the chamber extension tubes 320 and 330 can be selectively configured with L, for example, A milk and 335. Of course, in the case of a Fen Huhuashan and Dube, the outermost edge of the chamber extension tubes 320 and 330 may not be provided with sub-gamma γ, only as an extension of the main sound chamber cavity space. 13 M346237 In the chamber of the main sound chamber, the chamber extension tubes 320 and 330 can be arranged according to the signal characteristics, that is, the space in the cavity of the main sound chamber can be adjusted, thereby increasing the depth and breadth of the sound field. Of course, in other embodiments, the sound field exits of chamber extension tubes 320 and 330 can also be directed toward the rear chamber, which can be adjusted as desired by the design. The chamber body 310 and the sound chamber extending the sound field constitute the body of the multi-channel earphone structure 300, and the main sound chamber is appropriately spatially distributed to extend beyond the chamber body with the φ chamber extension tubes 320 and 330. The sound chamber (for example, Zi Lakou eight 325 and 335) and the sound field space formed by the front and rear squad (the main pi VIII 340 and the sub-port 850) form an appropriate amount of spatial sound field in the composite sound chamber. When receiving multiple sound source signals, it can be mixed with the tuning material placed in the mixing chamber of the previous cavity in the main cavity to form a saturated and hierarchical sound field. The multi-channel earphone structure 300 mentioned in this embodiment can be applied to a multi-channel sound source output from a DVD player. For example, the main system π eight 340 as the front main channel racquet, the sub racquet 350 can be used as the subwoofer à octagon, and the central channel system α eight and the surround channel u puncturing π eight can be respectively located in the chamber extension The sub-horns 325 and 335 of the tubes _ 320 and 330. The multi-channel earphone structure 300 described above is wrapped by the outer casing to become the earphones on the left and right sides of the multi-channel earphone, so as to be provided to the user. 3A is a partial cross-sectional view and an exploded view of the multi-channel earphone structure 3A of the above-described embodiment of the present invention, and the same elements are denoted by the same reference numerals. The multi-channel earphone structure 300 includes at least a chamber body 310, a main horn 340 and a sub-horn 350, and chamber extension tubes 320 and 330. The chamber body 31〇 includes a front cavity mixing chamber portion 312 and a rear chamber cavity portion 314, and the M346237 is spatially arranged by the chamber extension tubes 320 and 330 in accordance with signal characteristics, and the holes 315C and 315D are formed. Independent sound room section. It will be apparent from this illustration that the sound field exits of the chamber extension tubes 320 and 330 are respectively formed into the spaces formed in the holes 315C and 315D of the main sound chamber support frame 313, thus forming an independent sound chamber of an adjustable space size. Referring to FIG. 4, a schematic diagram of a digital decoding box circuit having a read source format proposed in the present embodiment is shown. φ This digital decoding box includes an automatic input selector (Auto Input

Selector) 402, Digital Signal Processing Circuit 404, 6-channel digital analog converter (6 Channel DAC) 406, 6 Channel Headphone Amplifier 408, subwoofer / pre-remaining team A Sub/Front Speaker Select Switch 410, a Delay Circuit 412, an Input Format Detector 420, a Microcontroller 430, a Control Panel 432, and a Display Module ( Display Module) 440 with three different supply voltages 450~454. 10 First, the Auto Input Selector 402 automatically selects the input source of the source signal and then transmits it to the digital signal processor 404. The input signal can be a fiber or coaxial source, and it complies with the S/PDIF or AES format signal. When both sources have a signal, the fiber signal is given priority.

The above S/PDIF format, full name Sony/Philips Digital Interface, as its name implies, is a specification developed by Sony and Philips. There are two ways to connect the S/PDIF. The first one uses the RCA 15 M346237 unbalanced connector and uses a 75 ohm signal line, and the other uses fiber. S/PDIF is the most commonly used digital signal in home specifications, such as MD (Mini Disk) digital recording and playback, DVD surround digital output. In this embodiment, an optical fiber connection using the S/PDIF format and the use of a fiber optic signal line output are used. The AES format, which is the AES/EBU format, uses a 110 ohm shielded strand. The digital signal processor 404 is responsible for processing multi-channel digital audio decoding, φ and internally containing decoding software for processing Dolby Digital 5.1, Dolby

Digital 2·0, Dolby Pro Logic, LPCM (stereo) or DTS encoding signals. The six-channel digital analog converter 406 mainly converts the digital signal processed by the digital signal into an analog signal. The microcontroller 430 is responsible for setting the digital signal processor 404 and the six-channel digital analog converter 4〇6 operating mode, including volume control, status monitoring, etc., and the decoder volume setting and decoding format and the like by the display module 44. 〇 Inform the user. Control panel 432 includes selections of master volume center, surround channel volume control, volume reset, and mute, and is transmitted to microcontroller 430. The /, 4-channel headphone amplifier 408 is responsible for amplifying the analog signal output from the six-channel digital analog converter 406 to drive the 51-channel earphone. The Delay Clrcuit 412 is responsible for protecting the human ear from the inrush current sent by the instantaneous amplifier to the port. The voltage stabilizing circuits 450-454 are respectively configured to receive a DC 9 volt wheel voltage and to convert the voltage to 3.3 volts, 5 volts and 6 volts to provide the voltage required for circuit operation. ^ 16 M346237 Input Format Detector 420 is responsible for judging the music format as 5. 1 or 2 · 0 (stereo), and according to the music format transmission control k number 432 to the subwoofer / pre-remaining selection switching device 41〇, used to control the adjustment of the speaker configuration for optimal listening. Subwoofer/Front = The speaker selection switching device 41 is used when the input source format is 51 channels 8 inches, and the + subwoofer will be sent to the left and right subwoofers. When the input source format is 2·0 channels (stereo), the front left and front right outputs will be connected to the left and right respectively.

Bass racquet, enhanced 2 〇 channel music effects, central and rear surround channels without any output. The present invention proposes an earphone device, including a bit decoding box and a multi-channel earphone with a detected sound source format, which can be connected to a digital sound source taken from a DVD player, for example, via an optical fiber or a coaxial cable, or from, for example, a game. The machine obtains a digital sound source through various different players, and provides signals of different sound field effects to the multi-channel earphone according to the content of the sound source. Although the present invention has been disclosed above in the preferred embodiment, it is not intended to create anyone skilled in the art, and without departing from the spirit of the present invention, § can be modified and retouched, so the creation of this creation, The scope defined in the patent application scope is subject to the definition of patent application. Ride [Simplified description of the figure] Number === Example of the proposed sound source format Bit solution, ^黯本_Implementation of the proposed image_source format number Ma Yi top view, front view, rear view and left view. 3A to 3D are respectively a front side view, a rear side view, a front view and a back view of a multi-channel ear 17 M346237 machine according to a preferred embodiment of the present invention. Figure 3E is a partial cross-sectional view and an exploded view of the multi-channel earphone structure of Figure 3A. 4 is a schematic diagram showing a circuit of a digital decoding box with a detected sound source format according to the present embodiment. [Illustration Description] 130: Digital Decoding Box 130 110: DVD Player 112: Line 120 • Game Host 140: Headset 200 : Digital decoding box 210 : Display screen 214 : Control panel 220 : Signal strength adjustment button 222 : Reset button • 224 : Mute button 230 : Optical fiber terminal input connection 埠 232 : Coaxial terminal connection 埠 234 · · Power input埠 236: changeover switches 240, 242, and 244: analog signal output 埠 250: multi-channel earphone 300: multi-channel earphone structure 18 M346237 310: chamber main body 312: front cavity mixing room portion 313: main sound chamber support frame 314 : Composite sound chamber cavity portions 315A to 315D: Hole 317: Projections 320, 330: Chamber extension tube 340: Main speaker 325, 335, 350: Sub-team 402: Auto Input Selector 404 : Digital Signal Processing Circuit 406: Six-channel digital analog converter (6QiannelDAC) 408: Six Channel Headphone Amplifier 410: Subwoofer / Sub/Front φ Speaker Select Switch 412 : Delay Circuit 420 : Input Format Detector 430 : Microcontroller 432 : Control Panel 440 : Display Module 450, 452, 454: Voltage Regulator 19

Claims (1)

M346237 Nine, the scope of application for patents: 1. A digital decoding box, suitable for connecting to a multi-channel earphone, the digital decoding box comprises: a digital signal processor for receiving an audio source signal, and performing decoding processing to output a Decoding signal; a multi-channel digital analog converter connected to the digital signal processing state for receiving the decoded signal and converting to a analog signal; a multi-channel headphone amplifier connected to the multi-channel digital analog The converter is configured to receive the analog signal, and output a set of pre-channel signals, a set of surround channel signals, a towel channel, and a subwoofer signal; - an input format_device, connected to the Rado Channel number ratio conversion ^ uses one to interpret the decoded signal's cell ^, and according to the output - control signal; Spicy, Emirates: late 'to receive the group of pre-channel signals, the group of surround = signal, , the oblique channel signal and the subwoofer signal, and the delay sound is prevented from being turned on to the subwoofer/pre-array eight-selection switching device, connected to the input format detection device and the Yanxian County For connecting the front channel signal and the output of the low standing device to switch the front channel and the tongue stand S ^ IW and according to the 5 Hai control signal, the number is not set ring scale signal And the subwoofer 3 ^ Shi Weng selection switching device immediately cuts off the pot weight low 2 the heavy low day / 刖 set channel respectively output to the multi-channel (four) two-two round "the group of pre-sound stereo cross-listening effect ^ Left and right subwoofers in the ear canal earphones to enhance 20 M346237 2. Digital decoding as described in the scope of claim i * An automatic input selector for receiving sources of two different sources ^ The sound source is used as the sound source signal and transmitted to the second. 3. As described in the second aspect of the patent application, the audio sources of the different formats are from the optical fiber line or the coaxial line. The digital solution automatic input selector described in the second item of the range is more preferentially processed for the sound source transmitted from the optical fiber line to the coaxial line. ” Two: Γ ίί: The digital solution described in the second item of the range a box, in which a coaxial line input port is used to receive the Sources of the different sources. 6. The digital decoding device described in the fourth paragraph of claim 4, the digital signal processing it can decode the encoded signal with DGlby Digital 5丨, Μς Digital Ζ0, Dolby Pro Logic, LPCM (stereo) or (10). 7. The digital decoding box of claim 1, further comprising a display device for displaying the working mode of the digital decoding box. > 8. The digital decoding box according to item 7 of the patent scope, wherein the working mode message includes different denier and decoding formats set by the digital decoding box. The digital decoding box described in claim 1 further includes a control panel for allowing a user to input a set value to adjust the control state of the digital decoding box. 21 M346237 i. The digital decoding box described in the scope of claim 2, further comprising a = controller' control digital signal processor and a working mode of the multi-channel digital analog conversion. ^ The digital decoding box of claim 10, wherein the e-hai working mode includes volume control or status control. 12. The digital decoding box of claim 10, wherein Further comprising a display device for receiving the working mode message sent by the micro control H. 13. The digital decoding box of claim 12, wherein the working mode message comprises a different sound setting and decoding format set by the digital decoding box. 14. The digital decoding box of claim 1, further comprising a control panel for allowing a user to input a set value for the control state of the microcontroller. "I 15·- a type of earphone device, comprising: a digital decoding box for receiving two different sound sources, and selecting one of the sound sources for processing, and detecting the format of the sound source, = a group Do not set the channel nickname, a set of surround channel signals, a central sound before J and a subwoofer signal; and a multi-channel earphone for receiving the set of front channel signals, the new product, the channel signal The central channel signal and the subwoofer signal are as follows: 16. The earphone device according to claim 15, wherein the group of front channel signals, the group of surround channel signals, the central sound Road ^ = 22 M346237 The subwoofer signal is transmitted to the left front speaker, the right front squad, the left rear squad, the right rear squad, the middle slap 17 and the heavy bass à eight. 17. The earphone device of claim 15, wherein the digital decoding box outputs, when the group of pre-channel signals are received without the group surround channel signal and the subwoofer signal, the group is The channel signals are combined and output to the left and right subwoofers of the multi-channel headphones to enhance the stereo cross-listening effect. 18. The earphone device of claim 15, wherein the digital decoding box is capable of decoding a coded signal having a Dolby Digital 5.1, Dolby Digital 2.0, DolbyPr〇Logic, LPCM (stereo) or DTS format. The earphone device of claim 15, wherein the digital decoding box comprises a display device for displaying a working mode message of the digital decoding box. 2〇·If you apply for the scope of the patent, you can use the 丄Setting L to adjust the control state of the digital decoding box. 21. The patented scope multi-channel earphone includes: the four-machine device of the tenth item, wherein the main two' includes a chamber main body and a main sound chamber support frame, which are formed into a plurality of holes. Wherein a cavity mixing chamber, a main sound chamber and a rear sound chamber are formed in the main body of the chamber; the chamber branch is twenty-eight, and the sub-la is eight', wherein the main la is eight in the main tooth and the first one is 0 Placed on the protrusion 23 M346237 of the chamber body, and the rear chamber is formed with the 5 liter main chamber support frame; and at least a pair of chambers to the extension tube are disposed outside the chamber body, and respectively An opening is directed toward the interior of the chamber body to form a portion of the main sound chamber, wherein the front chamber mixing chamber formed in the earphone structure is adjusted by the space between the inner space of the remote chamber body and the chamber extension tube A composite sound field characteristic is formed between the main sound chamber and the rear sound chamber, and serves as an output of the multi-channel earphone. The earphone device of claim 21, wherein the holes of the 10 and 2 chambers are used to transmit the sound field formed by the rear chamber to the front cavity mixing chamber. The composite sound field characteristics are formed. The earphone device of claim 21, wherein the holes of the main chamber support frame are used for the independent sound field formed by the pair of chamber extension tubes in the cavity to the inside of the body. Transfer to the front cavity mixing chamber to form the composite sound field characteristics. The earphone device according to claim 21, wherein the ten-cavity to the L-extension tube are respectively disposed with a second sub-batch and a third sub-frame, and the generated sound field is respectively in the cavity. The interior space of the chamber body forms an independent sound field. _ U 25 · The ear length set according to item 21 of the claim area, wherein the eighth is a front main channel remaining team of the 5.1 multi-channel sound source, and the first sub-horn can be used as a subwoofer a horn, and the second sub-horn and the third sub-spin α8 respectively serve as a center channel π8 and a surround channel racquet. twenty four